It hasn’t worked for me… Ive tried all the forums and nothing is working.
this is what I get.
sudo apt-get install apt-file
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package apt-file

im in the same boat as david h — i can see apt-get-repository using this search and have done update but command not found is still the result. (maybe something changed in 14.04.5 LTS which is what i’m running?)